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Pedestrians walk past a Gentle Dentist clinic in Sydney on July 2, 2015, one of four surgeries that are accused of poor cleaning and equipment sterilisation practices leading to up to 11,000 Australian dental patients being urged to see their doctors over fears they may have been exposed to HIV and hepatitis. New South Wales Health said 12 dentists from four surgeries were accused of poor cleaning and equipment sterilisation practices and advised patients to get blood tests for HIV as well as Hepatitis A, B and C as a precaution. AFP PHOTO / Peter PARKSPETER PARKS/AFP/Getty Images